Stirring Potential for Excitons |
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We demonstrate experimental proof of principle for a stirring potential for indirect excitons. The azimuthal wavelength of this stirring potential is set by the electrode periodicity, the amplitude is controlled by the applied AC voltage, and the angular velocity is controlled by the AC frequency. M.W. Hasling, Y.Y. Kuznetsova, P. Andreakou, J.R. Leonard, E.V. Calman, C.J. Dorow, L.V. Butov, M. Hanson, A.C. Gossard, Stirring Potential for Indirect Excitons, arXiv:1410.0622 (2014), J. Appl. Phys. 117, 023108 (2015). |
Electrostatic Conveyer for Excitons |
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We report on the study of indirect excitons in moving lattices - conveyers created by a set of AC voltages applied to the electrodes on the sample surface. The wavelength of this moving lattice is set by the electrode periodicity, the amplitude is controlled by the applied voltage, and the velocity is controlled by the AC frequency. We observed the dynamical localization-delocalization transition for excitons in the conveyers and measured its dependence on the exciton density and conveyer amplitude and velocity. We considered a model for exciton transport via conveyers. The theoretical simulations are in agreement with the experimental data. J.R. Leonard, A.G. Winbow, M. Remeika, Y.Y. Kuznetsova, A.A. High, A.T. Hammack and L.V. Butov, J. Wilkes, A.A. Guenther and A.L. Ivanov, M. Hanson and A.C. Gossard, Electrostatic conveyer for excitons, APS March Meeting, March 21-25, 2011, Dallas, TX. A. G. Winbow, J. R. Leonard, M. Remeika, Y. Y. Kuznetsova, A. A. High, A. T. Hammack, L. V. Butov, J. Wilkes, A. A. Guenther, A. L. Ivanov, M. Hanson, A. C. Gossard, Electrostatic Conveyer for Excitons, arXiv:1102.5329v1 (2011), Phys. Rev. Lett. 106, 196806 (2011). |
